Today, in the United States, what percentage of births are assisted by midwives?

Esther was given a memory test in January and administered a different memory test one year later. She scored almost identically on both tests. This indicates that the memory tests have

a) high test-retest reliability b) high interrater agreement c) alternate-form reliability d) none of the above are correct

Beryl is conducting an observational study and has trained two raters to use the rating instrument. Both of the raters drop out just after the study has begun, so Beryl has to substitute in less well-trained raters. Beryl has increased the risk of ____

a. low reliability of the measure b. low strength of the intervention c. poor reliability of treatment implementation d. random irrelevancies in the setting